<template>
    <div id="aCoursesList" class="bg-fa of">
        <!-- /课程详情 开始 -->
        <section class="container">
            <section class="path-wrap txtOf hLh30">
                <a href="#" title class="c-999 fsize14">首页</a>
                <a href="#" title class="c-999 fsize14">{{courseWebVo.subjectLevelOne}}</a>
                <span class="c-333 fsize14">{{courseWebVo.subjectLevelTwo}}</span>
            </section>
            <div>
                <article class="c-v-pic-wrap" style="height: 357px;">
                    <section class="p-h-video-box" id="videoPlay">
                        <img height="375px" :src="courseWebVo.cover" :alt="courseWebVo.title" class="dis c-v-pic">
                    </section>
                </article>
                <aside class="c-attr-wrap">
                    <section class="ml20 mr15">
                        <h2 class="hLh30 txtOf mt15">
                            <span class="c-fff fsize24">{{courseWebVo.title}}</span>
                        </h2>
                        <section class="c-attr-jg">
                            <span class="c-fff">价格：</span>
                            <b class="c-yellow" style="font-size:24px;">￥{{courseWebVo.price}}</b>
                        </section>
                        <section class="c-attr-mt c-attr-undis">
                            <span class="c-fff fsize14">主讲： {{courseWebVo.teacherName}}&nbsp;&nbsp;&nbsp;</span>
                        </section>
                        <section class="c-attr-mt of">
                            <span class="ml10 vam">
                                <em class="icon18 scIcon"></em>
                                <a class="c-fff vam" title="收藏" href="#" >收藏</a>
                            </span>
                        </section>
                        <section class="c-attr-mt" v-if="Number(courseWebVo.price) === 0 || isBuy">
                            <a href="#" title="立即观看" class="comm-btn c-btn-3">立即观看</a>
                        </section>
                        <section class="c-attr-mt" v-else>
                            <a @click="createOrder()" href="#" title="立即购买" class="comm-btn c-btn-3">立即购买</a>
                        </section>
                    </section>
                </aside>
                
                <aside class="thr-attr-box">
                    <ol class="thr-attr-ol clearfix">
                        <li>
                            <p>&nbsp;</p>
                            <aside>
                                <span class="c-fff f-fM">购买数</span>
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.buyCount}}</h6>
                            </aside>
                        </li>
                        <li>
                            <p>&nbsp;</p>
                            <aside>
                                <span class="c-fff f-fM">课时数</span>
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.lessonNum}}</h6>
                            </aside>
                        </li>
                        <li>
                            <p>&nbsp;</p>
                            <aside>
                                <span class="c-fff f-fM">浏览数</span>
                                <br>
                                <h6 class="c-fff f-fM mt10">{{courseWebVo.viewCount}}</h6>
                            </aside>
                        </li>
                    </ol>
                </aside>
                <div class="clear"></div>
            </div>
            <!-- /课程封面介绍 -->
            <div class="mt20 c-infor-box">
                <article class="fl col-7">
                    <section class="mr30">
                        <div class="i-box">
                            <div>
                                <section id="c-i-tabTitle" class="c-infor-tabTitle c-tab-title">
                                    <a name="c-i" class="current" title="课程详情">课程详情</a>
                                </section>
                            </div>
                            <article class="ml10 mr10 pt20">
                                <div>
                                    <h6 class="c-i-content c-infor-title">
                                        <span>课程介绍</span>
                                    </h6>
                                    <div class="course-txt-body-wrap">
                                        <section class="course-txt-body">
                                            <!-- description里面有<p>,使用v-html渲染页面内容标签 -->
                                            <span v-html="courseWebVo.description"></span>
                                        </section>
                                    </div>
                                </div>
                                <!-- /课程介绍 -->
                                <div class="mt50">
                                    <h6 class="c-g-content c-infor-title">
                                        <span>课程大纲</span>
                                    </h6>
                                    <section class="mt20">
                                        <div class="lh-menu-wrap">
                                            <menu id="lh-menu" class="lh-menu mt10 mr10">
                                                <ul>
                                                    <!-- 文件目录 -->
                                                    <li class="lh-menu-stair" v-for="chapter in chapterVideoList" :key="chapter.id">
                                                        <a href="javascript: void(0)" :title="chapter.title" class="current-1">
                                                            <em class="lh-menu-i-1 icon18 mr10"></em>{{chapter.title}}
                                                        </a>

                                                        <ol class="lh-menu-ol" style="display: block;">
                                                            <li class="lh-menu-second ml30" v-for="video in chapter.children" :key="video.id">
                                                                <a :href="'/player/' + video.videoSourceId" title target="_blank">
                                                                    <span class="fr">
                                                                    <i class="free-icon vam mr10">免费试听</i>
                                                                    </span>
                                                                    <em class="lh-menu-i-2 icon16 mr5">&nbsp;</em>{{video.title}}
                                                                </a>
                                                            </li>
                                                        </ol>

                                                    </li>
                                                </ul>
                                            </menu>
                                        </div>
                                    </section>
                                </div>
                            </article>
                        </div>
                    </section>
                </article>


                <aside class="fl col-3">
                    <div class="i-box">
                        <div>
                            <section class="c-infor-tabTitle c-tab-title">
                                <a title href="javascript:void(0)">主讲讲师</a>
                            </section>
                            <section class="stud-act-list">
                                <ul style="height: auto;">
                                    <li>
                                        <div class="u-face">
                                            <a href="#">
                                                <img :src="courseWebVo.avatar" width="50" height="50" alt>
                                            </a>
                                        </div>
                                        <section class="hLh30 txtOf">
                                            <a class="c-333 fsize16 fl" href="#">{{courseWebVo.teacherName}}</a>
                                        </section>
                                        <section class="hLh20 txtOf">
                                            <span class="c-999">{{courseWebVo.intro}}</span>
                                        </section>
                                    </li>
                                </ul>
                            </section>

                            <!-- 课程评论 -->
                            <section style="margin-top:30px">
                                <h6 class="c-c-content c-infor-title" id="i-art-comment">
                                <span class="commentTitle">课程评论</span>
                                </h6>
                                <section class="question-list lh-bj-list pr">
                                    <ul class="pr10">
                                        <li v-for="(comment,index) in comments.records" v-bind:key="index">
                                            <aside class="noter-pic">
                                                <img width="50" height="50" class="picImg" :src="comment.avatar">
                                            </aside>
                                            <div class="of">
                                                <span class="fl">
                                                <font class="fsize12 c-blue">
                                                {{comment.nickname}}</font>
                                                <font class="fsize12 c-999 ml5">评论：</font></span>
                                            </div>
                                            <div class="noter-txt mt5">
                                                <p>{{comment.content}}</p>
                                            </div>
                                            <div class="of mt5">
                                                <span class="fr"><font class="fsize12 c-999 ml5">{{comment.gmtCreate}}</font></span>
                                            </div>
                                        </li>
                                    </ul>
                                </section>
                                <!-- 公共分页 开始 -->
                                <div class="paging">
                                    <!-- undisable这个class是否存在，取决于数据属性hasPrevious -->
                                    <a :class="{undisable: !comments.hasPrevious}" href="#" title="首页" @click.prevent="gotoPage(1)">首</a>
                                    <a :class="{undisable: !comments.hasPrevious}" href="#" title="前一页" @click.prevent="gotoPage(comments.current-1)">&lt;</a>
                                    <a v-for="page in comments.pages" :key="page" :class="{current: comments.current == page, undisable: comments.current == page}"
                                        :title="'第'+page+'页'" href="#" @click.prevent="gotoPage(page)">{{page}}</a>
                                    <a :class="{undisable: !comments.hasNext}" href="#" title="后一页" @click.prevent="gotoPage(comments.current+1)">&gt;</a>                                
                                    <a :class="{undisable: !comments.hasNext}" href="#" title="末页" @click.prevent="gotoPage(comments.pages)">末</a>
                                    <div class="clear"/>
                                </div>
                                <!-- 公共分页 结束 -->
                                <!-- 写评论 -->
                                <section class="lh-bj-list pr mt20 replyhtml">
                                    <ul>
                                        <li class="unBr">
                                            <aside class="noter-pic">
                                                <img width="50" height="50" class="picImg" src="~/assets/img/avatar-boy.gif">
                                            </aside>
                                            <div class="of">
                                                <section class="n-reply-wrap">
                                                    <fieldset>
                                                        <textarea name="" v-model="commentInfo.content" placeholder="输入您要评论的文字" id="commentContent"></textarea>
                                                    </fieldset>
                                                    <p class="of mt5 tar pl10 pr10">
                                                        <span class="fl "><tt class="c-red commentContentmeg" style="display: none;"></tt></span>
                                                        <input type="button" @click="addComment()" value="回复" class="lh-reply-btn">
                                                    </p>
                                                </section>
                                            </div>
                                        </li>
                                    </ul>
                                </section>
                            </section>
                        </div>
                    </div>
                    
                </aside>
                                            
                <div class="clear"></div>
            </div>
        </section>
        <!-- /课程详情 结束 -->
    </div>
</template>
<script>
import courseApi from "@/api/course"
import cookies from "js-cookie"
import ordersApi from "@/api/orders"

export default {
    data() {
        return {
            //课程的详细信息
            courseWebVo : {},
            //课程的章节和小节
            chapterVideoList : {},

            //存储分页查询的评论信息
            comments : {},
            //存储添加评论的信息
            commentInfo : {
                courseId : '',
                teacherId : '',
                memberId : '',
                nickname : '',
                avatar : '',
                content : ''
            },
            //当前登录用户的基本信息
            loginInfo:{
                    id:'',
                    age:'',
                    avatar:'',
                    mobile:'',
                    nickname:'',
                    sex:''
                }
        }
    },
    created() {
        //获取当前的课程id
        this.courseId = this.$route.params.id

        this.isBuy = false
        //获取课程的详细信息
        this.getCourseInfo()
        //获取所有的评论
        this.getAllcomment(this.courseId, 1, 5)
        //获取用户信息
        this.getUserInfo()

        
    },
    methods: {
        //获取课程的详细信息
        getCourseInfo() {
            courseApi.getCourseInfo(this.courseId)
                .then(response => {
                    this.courseWebVo = response.data.data.courseWebVo,
                    this.chapterVideoList = response.data.data.chapterVideoList
                    this.isBuy = response.data.data.isBuy
                })
        },
        //获取所有的评论
        getAllcomment(courseId, page, limit) {
            courseApi.getCourseComment(courseId, page, limit)
                .then(response => {
                    this.comments = response.data.data
                })
        },
        //搜索指定页面
        gotoPage(page) {
            courseApi.getCourseComment(this.courseId, page, 5)
                .then(response => {
                    this.comments = response.data.data
                })
        },
        getUserInfo() {
            //获取当前用户的信息，发表评论时使用
            var userStr = cookies.get('guli_ucenter')
            if(userStr)
                this.loginInfo = JSON.parse(userStr)
        },
        //添加评论
        addComment() {
            this.commentInfo.courseId = this.courseId
            this.commentInfo.teacherId = this.courseWebVo.teacherId
            this.commentInfo.memberId = this.loginInfo.id
            this.commentInfo.nickname = this.loginInfo.nickname
            this.commentInfo.avatar = this.loginInfo.avatar
            courseApi.addComment(this.commentInfo)
                .then(response => {
                    this.$message({
                        type:'success',
                        message:'发表评论成功'
                    });
                    this.commentInfo.content = ''
                })
        },
        //生成订单
        createOrder() {
            ordersApi.createOrders(this.courseId)
                .then(response => {

                    //生成订单之后跳转到订单的显示页面
                    /**
                     * 跳转
                     * 1.this.$route.push({})
                     * 2.window.location.href = ""
                     */
                    this.$router.push({path:'/orders/' + response.data.data.orderNo})
                })
        }
    }
};
</script>